Copper electrodeposition on Au(111) from deep eutectic solvents (DESs) type III was investigated employing cyclic voltammetry as well chronoamperometry. It further examined Au(poly) using the electrochemical quartz crystal microbalance (EQCM). The employed DESs are mixtures of choline chloride (ChCl) or nitrate (ChNO3) with ethylene glycol (EG) hydrogen bond donor (HBD), each in a molar ratio 1...

in this study, copper chromite (cucr2o4) nanoparticles was prepared by inverse co-precipitation method. in this method, cupric nitrate trihydrate, (cu (no3)2.3h2o) and chromium nitrate nonahydrate, (cr (no3) 3.9h2o) with a mole ratio of 1:2 were used. characterization of cucr2o4 nanoparticles was performed by fourier transform infrared spectroscopy (ft-ir), raman spectroscopy, x-ray diffraction...

A simple colorimetric method is proposed for the micro-determination of copper in pure forms. The assay is based on the formation of a color complex between copper and resorcinol in presence of ammonia with peak absorption at 450 nm. The method is linear over 0.05 through 1.0 μg Cu (R ≥0.99). The regression coefficients vary from 0.275 to 0.920 depending upon the choice of experimental conditio...

When denitrifying bacteria such as Paracoccus denitrificans respire anaerobically they convert nitrate to dinitrogen gas via a pathway which includes the potent greenhouse gas, nitrous oxide (N2 O). The copper-dependent enzyme Nitrous Oxide reductase (Nos) catalyzes the reduction of N2 O to dinitrogen. In low-copper conditions, recent experiments in chemostats have demonstrated that Nos efficie...

A new microcrystal test for the detection of gamma-hydroxybutyrate (GHB) is described. The silver/copper reagent consists of an aqueous solution of 0.1 g of cupric nitrate and 0.1 g of silver nitrate in 10.0 mL water. While some crystals form upon evaporation of the reagent, the test forms distinctive crystals for GHB and does not form crystals with some commonly encountered controlled substanc...